reseda UK /ɹɪˈsiːdə/US /ɹəˈsidə/noun 3adjective 1forms 1 noun3 •Any of various plants of the genus Reseda having small, pale grayish green flowers, such as dyer's rocket (Reseda luteola) and mignonette (Reseda odorata).Reseda […] An herbe that hath a stalke like knots and joynts, a leafe like a nettle, and white in the middle. — 1640 •Mignonette (Reseda odorata). •A pale greyish-green colour like the flowers of a reseda plant; mignonette. adjective1 •Having a pale greyish-green colour like the flowers of a reseda plant; mignonette.By mixing a weaker bath than the one indicated the cotton dyes up a dark green, and the wool acquires a dull and weak reseda shade. — 1876 formsresedas